##===- bindings/ocaml/Makefile.ocaml -----------------------*- Makefile -*-===##
#
#                     The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
#
# An OCaml library is a unique project type in the context of LLVM, so rules are
# here rather than in Makefile.rules.
#
# Reference materials on installing OCaml libraries:
#
#   https://fedoraproject.org/wiki/Packaging/OCaml
#   http://pkg-ocaml-maint.alioth.debian.org/ocaml_packaging_policy.txt
#
##===----------------------------------------------------------------------===##

include $(LEVEL)/Makefile.config

# We have our own rules for building static libraries.
NO_BUILD_ARCHIVE = 1

# CFLAGS needs to be set before Makefile.rules is included.
CXX.Flags += -I"$(shell $(OCAMLFIND) c -where)"
C.Flags += -I"$(shell $(OCAMLFIND) c -where)"

ifeq ($(ENABLE_SHARED),1)
LINK_COMPONENTS := all
endif

include $(LEVEL)/Makefile.common

# Used in out-of-tree builds of OCaml bindings only.
ifdef SYSTEM_LLVM_CONFIG
LLVM_CONFIG = $(SYSTEM_LLVM_CONFIG)
LLVMLibsOptions += $(shell $(LLVM_CONFIG) --ldflags)
endif

# Intentionally ignore PROJ_prefix here. We want the ocaml stdlib. However, the
# user can override this with OCAML_LIBDIR or configure --with-ocaml-libdir=.
PROJ_libocamldir := $(DESTDIR)$(OCAML_LIBDIR)
OcamlDir := $(LibDir)/ocaml

# Info from llvm-config and similar
ifndef IS_CLEANING_TARGET
ifdef UsedComponents
UsedLibs = $(shell $(LLVM_CONFIG) --libs --system-libs $(UsedComponents))
UsedLibNames = $(shell $(LLVM_CONFIG) --libnames $(UsedComponents))
endif
endif

# How do we link OCaml executables with LLVM?
# 1) If this is a --enable-shared build, build stub libraries. This also allows
#    to use LLVM from toplevels.
# 2) If this is a --disable-shared build, embed ocamlc options for building
#    a custom runtime and a static executable. It is not possible to use LLVM
#    from toplevels.
ifneq ($(ObjectsO),)
ifeq ($(ENABLE_SHARED),1)
OCAMLSTUBS     := 1
OCAMLSTUBFLAGS := $(patsubst %,-cclib %, $(LLVMLibsOptions) -l$(LIBRARYNAME))
endif
endif

# Avoid the need for LD_LIBRARY_PATH
ifneq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
ifneq ($(HOST_OS),Darwin)
OCAMLRPATH     := $(RPATH) -Wl,'$$ORIGIN/../../lib'
endif
endif

# See http://caml.inria.fr/mantis/view.php?id=6642
OCAMLORIGIN    := -ccopt -L'$$CAMLORIGIN/..' \
                  -ccopt $(RPATH) -ccopt -Wl,'$$CAMLORIGIN/..'

# Tools
OCAMLCFLAGS += -I $(OcamlDir) $(addprefix -package ,$(FindlibPackages))

ifndef IS_CLEANING_TARGET
ifneq ($(ObjectsO),)
OCAMLAFLAGS += $(patsubst %,-cclib %, \
                 $(filter-out -L$(LibDir),-l$(LIBRARYNAME) \
                                          $(shell $(LLVM_CONFIG) --ldflags)) \
                                          $(UsedLibs) $(ExtraLibs))
else
OCAMLAFLAGS += $(patsubst %,-cclib %, \
                 $(filter-out -L$(LibDir),$(shell $(LLVM_CONFIG) --ldflags)) \
                                          $(UsedLibs) $(ExtraLibs))
endif
endif

ifneq ($(DEBUG_SYMBOLS),1)
  OCAMLDEBUGFLAG := -g
endif

Compile.CMI  := $(strip $(OCAMLFIND) c -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)
Compile.CMO  := $(strip $(OCAMLFIND) c -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)
Compile.CMX  := $(strip $(OCAMLFIND) opt -c $(OCAMLCFLAGS) $(OCAMLDEBUGFLAG) -o)

ifdef OCAMLSTUBS
# -dllib is engaged with ocamlc builds, $(OCAMLSTUBFLAGS) in ocamlc -custom builds.
Archive.CMA  := $(strip $(OCAMLFIND) c -a -dllib -l$(LIBRARYNAME) $(OCAMLSTUBFLAGS) \
																			 $(OCAMLDEBUGFLAG) $(OCAMLORIGIN) -o)
else
Archive.CMA  := $(strip $(OCAMLFIND) c -a -custom $(OCAMLAFLAGS) $(OCAMLDEBUGFLAG) \
                                       $(OCAMLORIGIN) -o)
endif

ifdef OCAMLSTUBS
Archive.CMXA := $(strip $(OCAMLFIND) opt -a $(OCAMLSTUBFLAGS) $(OCAMLDEBUGFLAG) \
                                         $(OCAMLORIGIN) -o)
else
Archive.CMXA := $(strip $(OCAMLFIND) opt -a $(OCAMLAFLAGS) $(OCAMLDEBUGFLAG) \
                                         $(OCAMLORIGIN) -o)
endif

# Source files
ifndef OcamlSources1
OcamlSources1 := $(sort $(wildcard $(PROJ_SRC_DIR)/*.ml))
endif

ifndef OcamlHeaders1
OcamlHeaders1 := $(sort $(wildcard $(PROJ_SRC_DIR)/*.mli))
endif

OcamlSources2 := $(filter-out $(ExcludeSources),$(OcamlSources1))
OcamlHeaders2 := $(filter-out $(ExcludeHeaders),$(OcamlHeaders1))

OcamlSources := $(OcamlSources2:$(PROJ_SRC_DIR)/%=$(ObjDir)/%)
OcamlHeaders := $(OcamlHeaders2:$(PROJ_SRC_DIR)/%=$(ObjDir)/%)

# Intermediate files
ObjectsCMI   := $(OcamlSources:%.ml=%.cmi)
ObjectsCMO   := $(OcamlSources:%.ml=%.cmo)
ObjectsCMX   := $(OcamlSources:%.ml=%.cmx)

ifdef LIBRARYNAME
LibraryCMA   := $(ObjDir)/$(LIBRARYNAME).cma
LibraryCMXA  := $(ObjDir)/$(LIBRARYNAME).cmxa
endif

ifdef TOOLNAME
ToolEXE      := $(ObjDir)/$(TOOLNAME)$(EXEEXT)
endif

# Output files
#   The .cmo files are the only intermediates; all others are to be installed.
OutputsCMI := $(ObjectsCMI:$(ObjDir)/%.cmi=$(OcamlDir)/%.cmi)
OutputsCMX := $(ObjectsCMX:$(ObjDir)/%.cmx=$(OcamlDir)/%.cmx)
OutputLibs := $(UsedLibNames:%=$(OcamlDir)/%)

ifdef LIBRARYNAME
LibraryA   := $(OcamlDir)/lib$(LIBRARYNAME).a
OutputCMA  := $(LibraryCMA:$(ObjDir)/%.cma=$(OcamlDir)/%.cma)
OutputCMXA := $(LibraryCMXA:$(ObjDir)/%.cmxa=$(OcamlDir)/%.cmxa)
endif

ifdef OCAMLSTUBS
SharedLib := $(OcamlDir)/dll$(LIBRARYNAME)$(SHLIBEXT)
endif

ifdef TOOLNAME
ifdef EXAMPLE_TOOL
OutputEXE := $(ExmplDir)/$(strip $(TOOLNAME))$(EXEEXT)
else
OutputEXE := $(ToolDir)/$(strip $(TOOLNAME))$(EXEEXT)
endif
endif

# Installation targets
DestLibs := $(UsedLibNames:%=$(PROJ_libocamldir)/%)

ifdef LIBRARYNAME
DestA    := $(PROJ_libocamldir)/lib$(LIBRARYNAME).a
DestCMA  := $(PROJ_libocamldir)/$(LIBRARYNAME).cma
DestCMXA := $(PROJ_libocamldir)/$(LIBRARYNAME).cmxa
endif

ifdef OCAMLSTUBS
DestSharedLib := $(PROJ_libocamldir)/dll$(LIBRARYNAME)$(SHLIBEXT)
endif

##===- Dependencies -------------------------------------------------------===##
# Copy the sources into the intermediate directory because older ocamlc doesn't
# support -o except when linking (outputs are placed next to inputs).

$(ObjDir)/%.mli: $(PROJ_SRC_DIR)/%.mli $(ObjDir)/.dir
	$(Verb) $(CP) -f $< $@

$(ObjDir)/%.ml: $(PROJ_SRC_DIR)/%.ml $(ObjDir)/.dir
	$(Verb) $(CP) -f $< $@

$(ObjectsCMI): $(UsedOcamlInterfaces:%=$(OcamlDir)/%.cmi)

ifdef LIBRARYNAME
$(ObjDir)/$(LIBRARYNAME).ocamldep: $(OcamlSources) $(OcamlHeaders) \
                                   $(OcamlDir)/.dir $(ObjDir)/.dir
	$(Verb) $(OCAMLFIND) dep $(OCAMLCFLAGS) $(OcamlSources) $(OcamlHeaders) > $@

-include $(ObjDir)/$(LIBRARYNAME).ocamldep
endif

ifdef TOOLNAME
$(ObjDir)/$(TOOLNAME).ocamldep: $(OcamlSources) $(OcamlHeaders) \
                                $(OcamlDir)/.dir $(ObjDir)/.dir
	$(Verb) $(OCAMLFIND) dep $(OCAMLCFLAGS) $(OcamlSources) $(OcamlHeaders) > $@

-include $(ObjDir)/$(TOOLNAME).ocamldep
endif

##===- Build static library from C sources --------------------------------===##

ifdef LibraryA
all-local:: $(LibraryA)
clean-local:: clean-a
install-local:: install-a
uninstall-local:: uninstall-a

$(LibraryA): $(ObjectsO) $(OcamlDir)/.dir
	$(Echo) "Building $(BuildMode) $(notdir $@)"
	-$(Verb) $(RM) -f $@
	$(Verb) $(Archive) $@ $(ObjectsO)
	$(Verb) $(Ranlib) $@

clean-a::
	-$(Verb) $(RM) -f $(LibraryA)

install-a:: $(LibraryA)
	$(Echo) "Installing $(BuildMode) $(DestA)"
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Verb) $(INSTALL) $(LibraryA) $(DestA)
	$(Verb)

uninstall-a::
	$(Echo) "Uninstalling $(DestA)"
	-$(Verb) $(RM) -f $(DestA)
endif


##===- Build stub library from C sources ----------------------------------===##

ifdef SharedLib
all-local:: $(SharedLib)
clean-local:: clean-shared
install-local:: install-shared
uninstall-local:: uninstall-shared

$(SharedLib): $(ObjectsO) $(OcamlDir)/.dir
	$(Echo) "Building $(BuildMode) $(notdir $@)"
	$(Verb) $(Link) $(SharedLinkOptions) $(OCAMLRPATH) -o $@ $(ObjectsO) \
			$(LLVMLibsOptions)

clean-shared::
	-$(Verb) $(RM) -f $(SharedLib)

install-shared:: $(SharedLib)
	$(Echo) "Installing $(BuildMode) $(DestSharedLib)"
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Verb) $(INSTALL) $(SharedLib) $(DestSharedLib)
	$(Verb)

uninstall-shared::
	$(Echo) "Uninstalling $(DestSharedLib)"
	-$(Verb) $(RM) -f $(DestSharedLib)
endif


##===- Deposit dependent libraries adjacent to OCaml libs -----------------===##

ifndef SYSTEM_LLVM_CONFIG
all-local:: build-deplibs
clean-local:: clean-deplibs
install-local:: install-deplibs
uninstall-local:: uninstall-deplibs

build-deplibs: $(OutputLibs)

$(OcamlDir)/%.so: $(LibDir)/%.so
	$(Verb) ln -sf $< $@
$(OcamlDir)/%.a: $(LibDir)/%.a
	$(Verb) ln -sf $< $@

$(OcamlDir)/%.o: $(LibDir)/%.o
	$(Verb) ln -sf $< $@

clean-deplibs:
	$(Verb) $(RM) -f $(OutputLibs)

install-deplibs:
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Verb) for i in $(DestLibs:$(PROJ_libocamldir)/%=%); do \
	  ln -sf "$(PROJ_libdir)/$$i" "$(PROJ_libocamldir)/$$i"; \
	done

uninstall-deplibs:
	$(Verb) $(RM) -f $(DestLibs)
endif

##===- Build ocaml interfaces (.mli's -> .cmi's) --------------------------===##

ifneq ($(OcamlHeaders),)
all-local:: build-cmis
clean-local:: clean-cmis
install-local:: install-cmis
uninstall-local:: uninstall-cmis

build-cmis: $(OutputsCMI)

$(OcamlDir)/%.cmi: $(ObjDir)/%.cmi $(OcamlDir)/.dir
	$(Verb) $(CP) -f $< $@

$(ObjDir)/%.cmi: $(ObjDir)/%.mli $(ObjDir)/.dir
	$(Echo) "Compiling $(notdir $<) for $(BuildMode) build"
	$(Verb) $(Compile.CMI) $@ $<

clean-cmis::
	-$(Verb) $(RM) -f $(OutputsCMI)

# Also install the .mli's (headers) as documentation.
install-cmis: $(OutputsCMI) $(OcamlHeaders)
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Verb) for i in $(OcamlHeaders:$(ObjDir)/%=%); do \
	  $(EchoCmd) "Installing $(BuildMode) $(PROJ_libocamldir)/$$i"; \
	  $(DataInstall) $(ObjDir)/$$i "$(PROJ_libocamldir)/$$i"; \
	done
	$(Verb) for i in $(OutputsCMI:$(OcamlDir)/%=%); do \
	  $(EchoCmd) "Installing $(BuildMode) $(PROJ_libocamldir)/$$i"; \
	  $(DataInstall) $(OcamlDir)/$$i "$(PROJ_libocamldir)/$$i"; \
	done

uninstall-cmis::
	$(Verb) for i in $(OutputsCMI:$(OcamlDir)/%=%); do \
	  $(EchoCmd) "Uninstalling $(PROJ_libocamldir)/$$i"; \
	  $(RM) -f "$(PROJ_libocamldir)/$$i"; \
	done
	$(Verb) for i in $(OcamlHeaders:$(ObjDir)/%=%); do \
	  $(EchoCmd) "Uninstalling $(PROJ_libocamldir)/$$i"; \
	  $(RM) -f "$(PROJ_libocamldir)/$$i"; \
	done
endif


##===- Build ocaml bytecode archive (.ml's -> .cmo's -> .cma) -------------===##

$(ObjDir)/%.cmo: $(ObjDir)/%.ml
	$(Echo) "Compiling $(notdir $<) for $(BuildMode) build"
	$(Verb) $(Compile.CMO) $@ $<

ifdef LIBRARYNAME
all-local:: $(OutputCMA)
clean-local:: clean-cma
install-local:: install-cma
uninstall-local:: uninstall-cma

$(OutputCMA): $(LibraryCMA) $(OcamlDir)/.dir
	$(Verb) $(CP) -f $< $@

$(LibraryCMA): $(ObjectsCMO) $(OcamlDir)/.dir
	$(Echo) "Archiving $(notdir $@) for $(BuildMode) build"
	$(Verb) $(Archive.CMA) $@ $(ObjectsCMO)

clean-cma::
	$(Verb) $(RM) -f $(OutputCMA) $(UsedLibNames:%=$(OcamlDir)/%)

install-cma:: $(OutputCMA)
	$(Echo) "Installing $(BuildMode) $(DestCMA)"
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Verb) $(DataInstall) $(OutputCMA) "$(DestCMA)"

uninstall-cma::
	$(Echo) "Uninstalling $(DestCMA)"
	-$(Verb) $(RM) -f $(DestCMA)
endif

##===- Build optimized ocaml archive (.ml's -> .cmx's -> .cmxa, .a) -------===##

# The ocamlopt compiler is supported on a set of targets disjoint from LLVM's.
# If unavailable, 'configure' will set HAVE_OCAMLOPT to 0 in Makefile.config.
ifeq ($(HAVE_OCAMLOPT),1)

$(OcamlDir)/%.cmx: $(ObjDir)/%.cmx
	$(Verb) $(CP) -f $< $@

$(ObjDir)/%.cmx: $(ObjDir)/%.ml
	$(Echo) "Compiling optimized $(notdir $<) for $(BuildMode) build"
	$(Verb) $(Compile.CMX) $@ $<

ifdef LIBRARYNAME
all-local:: $(OutputCMXA) $(OutputsCMX)
clean-local:: clean-cmxa
install-local:: install-cmxa
uninstall-local:: uninstall-cmxa

$(OutputCMXA): $(LibraryCMXA)
	$(Verb) $(CP) -f $< $@
	$(Verb) $(CP) -f $(<:.cmxa=.a) $(@:.cmxa=.a)

$(LibraryCMXA): $(ObjectsCMX)
	$(Echo) "Archiving $(notdir $@) for $(BuildMode) build"
	$(Verb) $(Archive.CMXA) $@ $(ObjectsCMX)
	$(Verb) $(RM) -f $(@:.cmxa=.o)

clean-cmxa::
	$(Verb) $(RM) -f $(OutputCMXA) $(OutputCMXA:.cmxa=.a) $(OutputsCMX)

install-cmxa:: $(OutputCMXA) $(OutputsCMX)
	$(Verb) $(MKDIR) $(PROJ_libocamldir)
	$(Echo) "Installing $(BuildMode) $(DestCMXA)"
	$(Verb) $(DataInstall) $(OutputCMXA) $(DestCMXA)
	$(Echo) "Installing $(BuildMode) $(DestCMXA:.cmxa=.a)"
	$(Verb) $(DataInstall) $(OutputCMXA:.cmxa=.a) $(DestCMXA:.cmxa=.a)
	$(Verb) for i in $(OutputsCMX:$(OcamlDir)/%=%); do \
	  $(EchoCmd) "Installing $(BuildMode) $(PROJ_libocamldir)/$$i"; \
	  $(DataInstall) $(OcamlDir)/$$i "$(PROJ_libocamldir)/$$i"; \
	done

uninstall-cmxa::
	$(Echo) "Uninstalling $(DestCMXA)"
	$(Verb) $(RM) -f $(DestCMXA)
	$(Echo) "Uninstalling $(DestCMXA:.cmxa=.a)"
	$(Verb) $(RM) -f $(DestCMXA:.cmxa=.a)
	$(Verb) for i in $(OutputsCMX:$(OcamlDir)/%=%); do \
	  $(EchoCmd) "Uninstalling $(PROJ_libocamldir)/$$i"; \
	  $(RM) -f $(PROJ_libocamldir)/$$i; \
	done
endif
endif

##===- Generate documentation ---------------------------------------------===##

$(ObjDir)/$(LIBRARYNAME).odoc: $(ObjectsCMI)
	$(Echo) "Documenting $(notdir $@)"
	$(Verb) $(OCAMLFIND) doc -I $(ObjDir) -I $(OcamlDir) -dump $@ $(OcamlHeaders)

ocamldoc: $(ObjDir)/$(LIBRARYNAME).odoc

##===- Debugging gunk -----------------------------------------------------===##
printvars:: printcamlvars

printcamlvars::
	$(Echo) "LLVM_CONFIG  : " '$(LLVM_CONFIG)'
	$(Echo) "OCAMLCFLAGS  : " '$(OCAMLCFLAGS)'
	$(Echo) "OCAMLAFLAGS  : " '$(OCAMLAFLAGS)'
	$(Echo) "OCAMLRPATH   : " '$(OCAMLRPATH)'
	$(Echo) "OCAMLSTUBS   : " '$(OCAMLSTUBS)'
	$(Echo) "OCAMLSTUBFLAGS : " '$(OCAMLSTUBFLAGS)'
	$(Echo) "OCAMLFIND    : " '$(OCAMLFIND)'
	$(Echo) "Compile.CMI  : " '$(Compile.CMI)'
	$(Echo) "Compile.CMO  : " '$(Compile.CMO)'
	$(Echo) "Archive.CMA  : " '$(Archive.CMA)'
	$(Echo) "Compile.CMX  : " '$(Compile.CMX)'
	$(Echo) "Archive.CMXA : " '$(Archive.CMXA)'
	$(Echo) "CAML_LIBDIR  : " '$(CAML_LIBDIR)'
	$(Echo) "LibraryA     : " '$(LibraryA)'
	$(Echo) "LibraryCMA   : " '$(LibraryCMA)'
	$(Echo) "LibraryCMXA  : " '$(LibraryCMXA)'
	$(Echo) "SharedLib    : " '$(SharedLib)'
	$(Echo) "OcamlSources1: " '$(OcamlSources1)'
	$(Echo) "OcamlSources2: " '$(OcamlSources2)'
	$(Echo) "OcamlSources : " '$(OcamlSources)'
	$(Echo) "OcamlHeaders1: " '$(OcamlHeaders1)'
	$(Echo) "OcamlHeaders2: " '$(OcamlHeaders2)'
	$(Echo) "OcamlHeaders : " '$(OcamlHeaders)'
	$(Echo) "ObjectsCMI   : " '$(ObjectsCMI)'
	$(Echo) "ObjectsCMO   : " '$(ObjectsCMO)'
	$(Echo) "ObjectsCMX   : " '$(ObjectsCMX)'
	$(Echo) "OCAML_LIBDIR : " '$(OCAML_LIBDIR)'
	$(Echo) "DestA        : " '$(DestA)'
	$(Echo) "DestCMA      : " '$(DestCMA)'
	$(Echo) "DestCMXA     : " '$(DestCMXA)'
	$(Echo) "DestSharedLib: " '$(DestSharedLib)'
	$(Echo) "UsedLibs     : " '$(UsedLibs)'
	$(Echo) "UsedLibNames : " '$(UsedLibNames)'
	$(Echo) "ExtraLibs    : " '$(ExtraLibs)'

.PHONY: printcamlvars   build-cmis \
            clean-a     clean-cmis     clean-cma     clean-cmxa \
          install-a   install-cmis   install-cma   install-cmxa \
          install-exe \
		uninstall-a uninstall-cmis uninstall-cma uninstall-cmxa \
		uninstall-exe
